diff --git a/dump_html.py b/dump_html.py
index f0daa79..ecc3de6 100755
--- a/dump_html.py
+++ b/dump_html.py
@@ -1,24 +1,29 @@
#!/usr/bin/env python2
# -*- coding: UTF-8 -*-
# File: dump_html.py
-# Date: Sat Nov 22 23:51:45 2014 +0800
+# Date: Sun Nov 23 16:37:48 2014 +0800
# Author: Yuxin Wu
import sys
-if len(sys.argv) != 3:
- sys.exit("Usage: {0} ".format(sys.argv[0]))
+if len(sys.argv) != 5:
+ sys.exit("Usage: {0}